Saving world info

Question

Hi,

I want to save and load a 3 dimensional(multidimensional array) int array, and it contains all my world info. And have been searching for hours, with no luck.

Answer 1

Best Answer

Answer by Xnary · Dec 10, 2012 at 11:05 PM

Okay, after hours of hairpulling i got it to work, starting by making the 3 dimensional array to a 1d, by doing this:

private int CalculateNewPos(int x, int y, int z)
{
	return z + y * size.z + x * size.z * size.y; 
}
	
private int[] CalculateOldPos(int pos)
{
	int x = 0;
	int y = 0;
	int z = 0;
	
	if (pos >= size.y * size.z)
	{
	 	x = pos / (size.y * size.z);
	 	pos %= size.y*size.z;
	}
	
	if (pos >= size.z)
	{
	 	y = pos / size.z;
	 	pos %= size.z;
	}
	
	z = pos;
		
	return new int[]{x, y, z};
}

Then after i got a 1 dimensional array i could just use filestream and BinaryFormatter to get it to save and load.

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FlowStateGames · Dec 11, 2012 at 10:50 AM 0

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Thanks for adding the final solution, much appreciated. It would be interesting to know why you chose this.

Xnary · Dec 11, 2012 at 12:04 PM 0

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Because i have so many object to save, that if i used XML like you recommended, it would have taken up a lot more hard disk space. If i where only to save a few objects with float precision, i maybe would have chosen XML.

FlowStateGames · Dec 11, 2012 at 12:08 PM 0

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Out of curiosity, did you look into serializing? I'm curious if it's more efficient. If it's not (which I doubt), it would also 'hide' the data from the player.

Answer 2

Answer by FlowStateGames · Dec 10, 2012 at 09:31 PM

Though we could use a bit more information, I think that there is a generic solution that could avail you. C# can serialize data to files, and deserialize it when reading. This has the upside of making the data compact, and the downside of not allowing it to be human readable.

Serialized

Here's a link that should get you started with serialization. There's a bit of a learning curve, but if you're worried about performance, you can go this route pretty easily.

XML

If you want human-readable code, think about using XML. Here's a google start for the syntax.

For the schema, assuming that each dimension represents a location in the scene graph, something simple like this could work:

 <world>
   <worldX>
     <worldY>
       <worldZ item="car"/>
       <worldZ/>
     </worldY>
     <worldY>
       <worldZ/>      
       <worldZ item="boat"/>
     </worldY>
   </worldX>
 <world>

Where your scene has a car at

world[0][0][0]

and a boat at

world[0]['1]['1].

sorry for the apostrophes above, the markup was assuming I was trying to write a link.

Like I said, I can only make assumptions based on the limited information you give, but those are the two generic solutions which occur to me.

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Xnary · Dec 10, 2012 at 09:36 PM 0

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Thanks for your comment. And you're right, i didn't give enough information. But your method would have been great for a small worlds, but some information i forgot to include is that i need to save 8'750'000 objects, with an id(int) and the position is all ready written to the multidimensional array. Since i don't need more precision than an int can give me.

Answer 3

Answer by Loius · Dec 10, 2012 at 09:03 PM

You have to write a save/load function. Use System.IO to write a formatted file, or you can use Unity's PlayerPrefs if you want it 'more hidden' from the user.

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Xnary · Dec 10, 2012 at 09:05 PM 0

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Thanks for the reply, i ended doing something like that. I will write the answer in a second.

Saving world info

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